0002-00000716

Problem description

When using Signature Version 4 (V4) authentication, the service identifier in the Credential field of a POST request is invalid.

Root cause

You sent a POST request that uses V4 authentication, but the service identifier in the request is incorrect or unsupported.

Problem examples

You sent the following invalid request, which uses s3 as the service identifier:

POST / HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Content-Type: multipart/form-data; boundary=9431149156168
Content-Length: 884

--9431149156168
Content-Disposition: form-data; name="key"

oss.jpg
--9431149156168
Content-Disposition: form-data; name="x-oss-credential"

YourAccessKeyID/20250601/cn-hangzhou/s3/aliyun_v4_request
--9431149156168

This error occurs because s3 is not a valid service identifier for Alibaba Cloud OSS.

Solution

Make sure the service identifier in your POST request with V4 authentication is correct and supported. Update the request to use a valid service identifier.

POST / HTTP/1.1
Host: oss-example.oss-cn-hangzhou.aliyuncs.com
Content-Type: multipart/form-data; boundary=9431149156168
Content-Length: 884

--9431149156168
Content-Disposition: form-data; name="key"

oss.jpg
--9431149156168
Content-Disposition: form-data; name="x-oss-credential"

YourAccessKeyID/20250601/cn-hangzhou/oss/aliyun_v4_request
--9431149156168